[Bldg-sim] 90.1-2010 Appendix G heat source question

[Rosenberg, Michael I]

Christopher,

I assume your building is non-residential. If that is the case the baseline system for a non-residential building with 9 floors must be System 7 or 8. Since the proposed building is gas/electric hybrid, that drives the baseline to system 7. Based on G3.1.3.2 your boiler will be fossil fuel. Systems qualifying for the exception under G3.1.1b should use the same heating source as the main system, so that means System 3.

Mike

__________________________

Michael Rosenberg, CEM, LEED AP
Senior Research Scientist
ENERGY & ENVIRONMENT DIRECTORATE

Pacific Northwest National Laboratory
2032 Todd Street
Eugene, OR 97405
(541) 844-1960
michael.rosenberg at pnnl.gov<mailto:michael.rosenberg at pnl.gov>
www.pnnl.gov<http://www.pnl.gov/>



From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jones, Christopher
Sent: Friday, November 14, 2014 1:01 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] 90.1-2010 Appendix G heat source question

The proposed design has 9 floors and has heat recovery chillers, air-to-water heat pumps and natural gas boilers for the heating plant.  Based on Table G3.1.1A, I selected System 5.  Based on G3.1.3.2, I selected electric boiler as the predominate heat source is electric.

Based on G3.1.1 exception b.  I have some spaces that require a single zone system.  As the building has Fossil/Electric Hybrid heating, I select System 3 - PSZ-AC.  My question is: should the heat source of these systems be gas furnace as per Table G3.1.1A or should I select electric resistance as the predominate heat source is electric?

Thanks for any insights!


Christopher Jones, P.Eng.
Halsall Associates
Tel: 416.644.4226 * Toll Free: 1.888.425.7255 x 527 *  www.halsall.com<http://www.halsall.com/>
Vancouver * Calgary * Sudbury  * Burlington * Toronto * Ottawa
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